Method of making expanded sheet metal.



No. 891,822. PATENTED JUNE 30, 1908. F. A. DELANO.

METHOD OF MAKING EXPANDED SHEET METAL.

APPLICATION FILED JULY 19,1906.

it it M i @FFIQE.

FREDERIO A. DELANO, OF CHICAGO, ILLINOIS.

Specification Letters Patent.

Patented June 30, 1908.

Application filed July 19, 1938. Serial No. 326,862.

To all whom it may concern:

Be it known that I, Fnnnnine A. Dim-mo, a citizen of the United States, residing at Chicago, in the county of Cook and tate of Illinois, have invented certain new and useful Improvements in Methods of Making;

ing. Fig. 2 is :1. plan ew of the linislu-d product. Fig. 3 is an edge view of the sheet shown in Fig. 2.

Expanded sheet metal has hitherto been made of metal of uniform. thickness. it is desirable thzit expanded metal sheet he so formed as to provide additional strength whore greater tensile strength required, as in fencing, or when used as a reinhirccmcnt in concrete. construction.

in carrying out my invention, therefore, I provide a sheetorplateoi imt-tzilhirmed with a se ies of parallel rihs Z) extending across the sheet at regular intervals. I then slit the sheet, each alternate slit c extending .hetweeu two ot the parallel rcinhirccments or ribs, as they maybe tcrn'ied, and across or through the intermediate ril), formingstrands l), as will be readily understood 'lhus between the adjacent strands is formed, by a portion of the ribs 1), a thickened reinlorcmncnt. The sheet is then expanded in the usual manner. resulting in the sheet ol expanded metal shown in Fig. 2. it will be noted that successive strands I) are grouped in a plural ity of linear series, and that there are two interse ting sets ol. such series, all the series of one set lying in parallel directions. 'lhus the strands p, y), p, and 11-" belong to one series, while the strands q, and g lie-long to another series, and moreover these two sample series lie-long respectively to the two sets just referred to. l/Vherever one strand joins another there is an enlargement or head. 7). The expanded metal may in this way-possess superior strength, and is especially useful for this reason in reinforced concrete construction. The thickened joint portionsere also liable to rust out when the sheet is used for fencing purposes.

l t will understood that the shape of the ribs or reinlorcii'ig portions 3) is immaterial. it may he made of any desired size also.

l claim:

l Thev i'nethod of making expanded metal which consists in. tor-mine a sheet with parallel ribs then slit-ting the sheet tra-nsversel} ol said ribs, and then expanding the sheet.

2. The method of making expanded metal which consi. in forming a sheet having places of greater thickness than the renninder of the sheet, then slitting the sheet across said thickened places, and then expanding the sheet.

3. The method of making expended metal which consists in iormirng a sheet having thickened places, then slit ing the sheet into str ids hut leaving the thickened places beecs at the junction points of the strands,

and then expanding the sheet.

4. The method of linking expended metal, which consis s '11 forming a sheet with parallel ribs, cutting slits in the sheet so that each slit Sllttli extend between two ribs across an intermediate rib, and then expanding the sheet.

.3, The method of making expended metal which consists in. forming a sheet with para-llcl thickened ribs, cutting slits across each of the several rihs, the slits through alternate ribs alining; and being staggered with respect to the slits in the intermediate rib, and then expanding the. slittcd sheet.

l ltl llll'lltlO A. DELANO.

Witnesses 3 

